> The problem with the oscillator turned out to be even easier to fix than > I could have hoped for. There's a ferrite transformer on the output - > possibly a balun. The wire is about the thickness of a hair. The > ferrite isn't tied down - it's just held by the leads. I don't know if > it took a physical hit or if the solder just dissolved the wire over the > years, but one of the leads had broken. I resoldered it and instead of > a wobbly level of -20 to -30 dbm into 50 ohms, I now have a much more > satisfying level of ~ +12 dbm. And the levels in the rest of the unit > now make sense. Instead of hitting a Minicircuit RPD-1 Phase Detector > with a level around -30 dbm, it's now seeing a level of +7 dbm - just > what it should be. > > I'd like to thank you, John, and everyone else for their ideas. They > were a great help.
You're welcome; that's exactly what was wrong with my ULN, actually. The output balun had a broken lead. They should be gluing those down, I guess. Someone had also broken the trimmer by shoving an alignment tool in too far, but that wasn't the main problem. -- john, KE5FX _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.